Improvement in ponton-bridges



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D. KLEIN. Pontoon-Bridges.

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Pontoon-Bridges. N0 147 775 Patented Feb.24,1874.

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UNITED STATES PATENT OFFICE.

DAVID KLEIN, OF NEW YORK, N. Y.

IMPROVEMENT IN PONTON-BRIDGES.

Specification forming part of Letters Patent No. 147,775, dated February 24, 1874; application led February 9, 1874.

To all Iwhom it may concern:

Beit known that I, DAVID KLEIN, of New York, in the county of New York and in the State of New York, have invented certain new and useful Improvements in Floating Bridges; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of a oating bridge, as will be hereinafter more fully set forth. I

In the accompal'lying drawings, Figure l is a side elevation, and Fig. 2 a plan view, of my bridge.

My bridge is made in sections of any suitable number and length. The end sections, A A, are made stationary, and more or less inclined, as required, and rest upon piers B B, built in any of the known and usual ways. The intermediate sections are each supported upon two or more boats, U G, each of which has cross-beams l) laid on top of and secured to it. From these cross-beams extend vertical posts E E, which support top beams G Gr, as shown. These beams and posts or pillars are rigidly secured together, and the posts suitably braced, if desired. The top beams G Gr support the sections'II I'I of the bridge, which are united together by means of bolts a a passing through loops b b, as shown in Fig. 2. The boats C G are anchored at both ends by means of anchors I I and chains or cables Z d., which latter should be woundupon suitable windlasses to accommodate them to the ebb and ilow of the tide.

The whole bridge should be provided with suitable railings as well as divisions, to form foot-walks along each side, with a carriage-way in the center; or a railroad-track may be laid thereon to allow trains to pass back and forth- Either section, H, may be removed to allow vessels to pass up and down, and is easily returned in position.

A bridge constructed in this manner may be used across any river not over two `miles wide, and may be kept in its place t-he whole year around, except for a few days at the time when the ice breaks.

J J represent ice-breakers to prevent the ice from injuring the boats.

In ponton-bridges, as now usually constructed, great care must be taken in passing over the same, and they can only be used for com paratively light bodies.

It will be observed that by making the supwhat I claim as new, and desire to secure by i Letters Patent, is-

A iloating bridge constructed in sections, each section consisting of two boats provided with standards E E at each end, connected at the top by the beams G, and supporting a section, H, of the crossing, which sections are se- -cured by rigid connections a b, all the parts being combined and operating as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 7 th day of February, 1874.

l). KLEIN.

Witnesses:

A. N. MARR, H. J. SMITH. 

